CN107248692A - A kind of compound cavity optical fibre laser of super-narrow line width Wavelength tunable - Google Patents
A kind of compound cavity optical fibre laser of super-narrow line width Wavelength tunable Download PDFInfo
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- CN107248692A CN107248692A CN201710356895.6A CN201710356895A CN107248692A CN 107248692 A CN107248692 A CN 107248692A CN 201710356895 A CN201710356895 A CN 201710356895A CN 107248692 A CN107248692 A CN 107248692A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/1067—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using pressure or deformation
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Abstract
The present invention relates to generating laser technical field, a kind of compound cavity optical fibre laser of super-narrow line width Wavelength tunable is referred specifically to.A kind of compound cavity optical fibre laser of super-narrow line width Wavelength tunable of the present invention, wavelength division multiplexer, EDFA Erbium-Doped Fiber Amplifier, 2 × 2 fiber couplers, first optoisolator, y-type optical fiber coupler is sequentially connected the main resonance cavity for constituting annular, tunable F P wave filters, semiconductor saturated absorbing body, 2 × 2 fiber couplers, second optoisolator is sequentially connected the short oscillation cavity for constituting annular, the present invention is rational in infrastructure, with linear cavity, based on annular chamber and compound cavity optical fibre laser, the size of voltage signal on tunable F P wave filters is applied to by changing, frequency and waveform, the variable condition of the built-in PZT cavity length of regulation, line width compression and wavelength fine tune deeply are carried out to optical-fiber laser, obtain the function of super-narrow line width and Wavelength tunable；The present invention has simple in construction, anti-electromagnetic interference, wavelength line width ultra-narrow, the more low outstanding advantages of cost.
Description
Technical field
The present invention relates to generating laser technical field, refer specifically to a kind of Compound Cavity optical fiber of super-narrow line width Wavelength tunable and swash
Light device.
Background technology
At present, an important development focus direction of optical fiber laser is exactly super-narrow line width optical fiber laser.It is existing to grind
Study carefully and show, single longitudinal mode super-narrow line width optical fiber laser mainly there are two kinds of structures of linear cavity and annular chamber.In shorter gain fibre
Upper inscription fiber grating can make the wider distributed Feedback grating (DFB) and distributed Bragg reflector of free spectrum width
(DBR) linear short cavity optical fiber laser, can be made by parameters such as the gain of designing gain optical fiber, the reflectivity of grating and chamber length
Laser realizes that single longitudinal mode is operated, and the line width of output laser can reach below 10KHz, by piezoelectric ceramics (PZT) extruding also
It can change that chamber is long, realize the wavelength tuning of laser.Circular cavity optic fibre laser realizes that the structure of single longitudinal mode operating is somewhat complicated,
By certain linewidth compression and frequency stabilization mechanism, the single longitudinal mode output of laser can be achieved, laser exports the line of laser
Width can be less than 1KHz.
Super-narrow line width optical fiber laser, it is characterized in that output laser has extremely narrow line width, it is most narrow to can reach 10-8Nm, swashs
Light is exported in the form of intracavitary vibrates single longitudinal mode, at present, obtain line width be less than KHz laser signal Main Means it
One is exocoel compression.It is achieved in that and lasing light emitter is filtered using the reference cavity with superregulated property and ultra-narrow passband
Ripple, finally obtains line width and reaches the hertz even laser signal of millihertz hereby magnitude.
The advantage of exocoel compression method is to obtain the laser signal that line width is extremely narrow, stability is high, but its shortcoming
It is same obvious, its Primary Component --- high-fineness reference cavity often bulky, and need a whole set of thermally-stabilised and shock insulation
Mechanism is to ensure its stability, it is impossible to meet the demand of the applications such as communication, high-precision sensing.The optical fiber laser of ring cavity structure
The output that laser linewidth is less than KHz can be obtained, based on nonlinear effect (such as stimulated Brillouin scattering, backward Rayleigh scattering
Deng) laser can also obtain laser output of the line width for hundred hertz of magnitudes, its resonator is often up to several meters to hundreds of meters
, the interference of external environment is highly susceptible to, and can not be integrated, it is also difficult to large-scale application.
Therefore, prior art, which also has, needs to be improved and develops.
The content of the invention
In view of the defects and deficiencies of the prior art, the present invention intends to provide one kind it is rational in infrastructure,
To achieve these goals, the present invention uses following technical scheme：
A kind of compound cavity optical fibre laser of super-narrow line width Wavelength tunable of the present invention, including pump light source, wavelength-division
Multiplexer, EDFA Erbium-Doped Fiber Amplifier, 2 × 2 fiber couplers, the first optoisolator, y-type optical fiber coupler, tunable F-P filtering
Device, the second optoisolator and semiconductor saturated absorbing body；The wavelength division multiplexer, EDFA Erbium-Doped Fiber Amplifier, 2 × 2 fiber couplings
Device, the first optoisolator, y-type optical fiber coupler are sequentially connected the main resonance cavity for constituting annular, EDFA Erbium-Doped Fiber Amplifier therein
It is connected with Second terminal, the forth terminal of the first optoisolator respectively with 2 × 2 fiber couplers, pump light source and wavelength-division multiplex
Device is connected, and wherein one end of y-type optical fiber coupler is drawn and is used as laser output；The tunable TEA CO2 laser, semiconductor
Saturated absorbing body, fiber coupler, the second optoisolator are sequentially connected the short oscillation cavity for constituting annular, semiconductor saturation therein
Absorber and the second optoisolator the first terminal respectively with 2 × 2 fiber couplers, third terminal are connected.
According to above scheme, the Compound Cavity optical fiber that the main resonance cavity and short oscillation cavity constitute super-narrow line width Wavelength tunable swashs
Light device, tunable TEA CO2 laser therein is the frequency-selecting device of compound cavity optical fibre laser.
According to above scheme, the Free Spectral Range of the compound cavity optical fibre laser and the free spectrum model of short oscillation cavity
Enclose approximate, and then control the chamber length of short oscillation cavity that the increasing of longitudinal mode spacing can be achieved.
According to above scheme, the tunable TEA CO2 laser is high performance lead base piezoelectric ceramic filter.
According to above scheme, the semiconductor saturated absorbing body is prepared using CNT.
According to above scheme, the tunable TEA CO2 laser 8 follows multiple-beam interference principle, and each transmitted wave is with before
The phase difference of one transmitted light wave is：
Wherein λ is the output wavelength of single-mode laser, and n is intracavitary material refractive index, and i is refraction angle；
Transmitted light intensity is：
Wherein R is the fiber end face reflectivity of F-P cavity inside tunable TEA CO2 laser, I0For initial beam intensity.
The present invention has the beneficial effect that：The present invention is rational in infrastructure, existing with linear cavity, annular chamber and compound cavity optical fibre laser
Based on technology, the size of voltage signal, frequency and waveform on tunable TEA CO2 laser are applied to by changing, in regulation
The variable condition for the PZT cavity length put, line width compression and wavelength fine tune deeply is carried out to optical-fiber laser, so as to obtain super
The function of narrow linewidth and Wavelength tunable；The present invention has simple in construction, anti-electromagnetic interference, and wavelength line width ultra-narrow, cost is more low
Outstanding advantages.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the present invention.
In figure：
1st, pump light source；2nd, wavelength division multiplexer；3rd, EDFA Erbium-Doped Fiber Amplifier；4th, 2 × 2 fiber coupler；5th, the first light every
From device；6th, y-type optical fiber coupler；7th, the second optoisolator；8th, tunable TEA CO2 laser；9th, semiconductor saturated absorbing body；41、
The first terminal；42nd, Second terminal；43rd, third terminal；44th, forth terminal.
Embodiment
Technical scheme is illustrated with embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of compound cavity optical fibre laser of super-narrow line width Wavelength tunable of the present invention, including pumping
Light source 1, wavelength division multiplexer 2, EDFA Erbium-Doped Fiber Amplifier 3,2 × 2 fiber couplers 4, the first optoisolator 5, y-type optical fiber coupler
6th, tunable TEA CO2 laser 8, the second optoisolator 7 and semiconductor saturated absorbing body 9；The wavelength division multiplexer 2, erbium-doped fiber
Amplifier 3,2 × 2 fiber couplers 4, the first optoisolator 5, y-type optical fiber coupler 6 are sequentially connected the main resonance for constituting annular
Chamber, the Second terminal the 42, the 4th of the optoisolator 5 of EDFA Erbium-Doped Fiber Amplifier 3 and first therein respectively with 2 × 2 fiber couplers 4
Terminal 44 is connected, and pump light source 1 is connected with wavelength division multiplexer 2, and wherein one end of y-type optical fiber coupler 6 is drawn and is used as laser
Output end；Using EDFA Erbium-Doped Fiber Amplifier 3 to obtain high-gain in the main resonance cavity.
The tunable TEA CO2 laser 8, semiconductor saturated absorbing body 9,2 × 2 fiber couplers 4, the second optoisolator 7
Be sequentially connected constitute annular short oscillation cavity, the optoisolator 7 of semiconductor saturated absorbing body 9 and second therein respectively with 2 × 2 light
The first terminal 41 of fine coupler 4, third terminal 43 are connected；2 × 2 fiber coupler 4 connects main resonance cavity and short respectively
Resonator carries out linewidth compression, wherein partly leading by tunable TEA CO2 laser 8 so as to constitute annular compound chamber to laser in ring
Body saturated absorbing body 9 absorbs at light pulse edge compared with weak part, so that retain stronger pulse center to obtain narrower pulse,
So as to realize linewidth compression and suppression mode saltus step；Coupled by the super-narrow line width laser of multiple linewidth compression by y-type optical fiber
The laser of the output of device 6 10%, residue 90% returns to annular compound chamber；Is respectively equipped with described main resonance cavity and short oscillation cavity
One optoisolator 5 and the second optoisolator 7, can prevent the spatial hole burning of annular compound chamber from producing.
The tunable TEA CO2 laser 8 follows multiple-beam interference principle, each transmitted wave and previous transmitted light wave
Phase difference is：
Wherein λ is the output wavelength of single-mode laser, and n is intracavitary material refractive index, and i is refraction angle.
Transmitted light intensity is：
Wherein R is the fiber end face reflectivity of F-P cavity inside tunable TEA CO2 laser, I0For initial beam intensity.
Understood by above formula when meeting δ=2m π (m is integer) condition, the maximum of interferometer transmitted light intensity distribution can be obtained,
Tunable TEA CO2 laser (8) forms stable vibration to the light ware energy for meeting δ=2m π and exports equally spaced pectination waveform.When
After m values take calmly, it is determined that the factor with peak transmittance wavelength for meeting phase condition is n, d and i, therefore these three ginsengs are adjusted
Amount can just reach the purpose of wavelength tuning.
The main resonance cavity and short oscillation cavity constitute the compound cavity optical fibre laser of super-narrow line width Wavelength tunable, it is therein can
Tune frequency-selecting device of the F-P wave filters 8 for compound cavity optical fibre laser.
The Free Spectral Range of the compound cavity optical fibre laser is approximate with the Free Spectral Range of short oscillation cavity, and then controls
The increasing of longitudinal mode spacing can be achieved in the chamber length of short oscillation cavity processed.
The tunable TEA CO2 laser 8 is high performance lead base piezoelectric ceramic filter.
The semiconductor saturated absorbing body 9 is prepared using CNT, and semiconductor saturated absorbing body 9 can be changed according to demand
CNT with different tube diameters, with faster response time, relatively wide operation wavelength, using flexible, making simply
The characteristics of.
Described above is only the better embodiment of the present invention, therefore all constructions according to described in present patent application scope,
The equivalent change or modification that feature and principle are done, is included in the range of present patent application.
Claims (6)
1. a kind of compound cavity optical fibre laser of super-narrow line width Wavelength tunable, it is characterised in that：Including pump light source (1), wavelength-division
Multiplexer (2), EDFA Erbium-Doped Fiber Amplifier (3), 2 × 2 fiber couplers (4), the first optoisolator (5), y-type optical fiber coupler
(6), tunable TEA CO2 laser (8), the second optoisolator (7) and semiconductor saturated absorbing body (9)；The wavelength division multiplexer
(2), EDFA Erbium-Doped Fiber Amplifier (3), 2 × 2 fiber couplers (4), the first optoisolator (5), y-type optical fiber coupler (6) be successively
Connect and compose the main resonance cavity of annular, EDFA Erbium-Doped Fiber Amplifier (3) therein and the first optoisolator (5) respectively with 2 × 2 optical fiber
The Second terminal (42) of coupler (4), forth terminal (44) connection, pump light source (1) are connected with wavelength division multiplexer (2), Y type light
Draw and be used as laser output in wherein one end of fine coupler (6)；The tunable TEA CO2 laser (8), semiconductor saturation are inhaled
Acceptor (9), 2 × 2 fiber couplers (4), the second optoisolator (7) are sequentially connected the short oscillation cavity for constituting annular, therein half
Conductor saturated absorbing body (9) and the second optoisolator (7) the first terminal (41) respectively with 2 × 2 fiber couplers (4), the 3rd
Terminal (43) is connected.
2. the compound cavity optical fibre laser of super-narrow line width Wavelength tunable according to claim 1, it is characterised in that：The master
Resonator and short oscillation cavity constitute the compound cavity optical fibre laser of super-narrow line width Wavelength tunable, tunable TEA CO2 laser therein
(8) it is the frequency-selecting device of compound cavity optical fibre laser.
3. the compound cavity optical fibre laser of super-narrow line width Wavelength tunable according to claim 2, it is characterised in that：It is described multiple
The Free Spectral Range for closing cavity optical fibre laser is approximate with the Free Spectral Range of short oscillation cavity, and then controls the chamber of short oscillation cavity
The increasing of long achievable longitudinal mode spacing.
4. the compound cavity optical fibre laser of super-narrow line width Wavelength tunable according to claim 1, it is characterised in that：It is described can
It is high performance lead base piezoelectric ceramic filter to tune F-P wave filters (8).
5. the compound cavity optical fibre laser of super-narrow line width Wavelength tunable according to claim 1, it is characterised in that：Described half
Conductor saturated absorbing body (9) is prepared using CNT.
6. the compound cavity optical fibre laser of super-narrow line width Wavelength tunable according to claim 1, it is characterised in that：It is described can
Tuning F-P wave filters (8) follow multiple-beam interference principle, and each transmitted wave and the phase difference of previous transmitted light wave are：
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Wherein λ is the output wavelength of single-mode laser, and n is intracavitary material refractive index, and i is refraction angle；
Transmitted light intensity is：
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Wherein R is the fiber end face reflectivity of F-P cavity inside tunable TEA CO2 laser, I0For initial beam intensity.
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| CN201710356895.6A CN107248692B (en) | 2017-05-19 | 2017-05-19 | Ultra-narrow linewidth wavelength-adjustable composite cavity optical fiber laser |
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| CN201710356895.6A CN107248692B (en) | 2017-05-19 | 2017-05-19 | Ultra-narrow linewidth wavelength-adjustable composite cavity optical fiber laser |
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| CN107248692A true CN107248692A (en) | 2017-10-13 |
| CN107248692B CN107248692B (en) | 2020-01-14 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107785771A (en) * | 2017-10-27 | 2018-03-09 | 西安深瞳智控技术有限公司 | A kind of Dan Zong for improving wavelength delivery efficiency touches multi-wavelength tunable Optical Maser System and method |
| CN112152078A (en) * | 2020-09-29 | 2020-12-29 | 武汉敏芯半导体股份有限公司 | Narrow linewidth laser and manufacturing method thereof |
| CN113872040A (en) * | 2021-09-27 | 2021-12-31 | 重庆大学 | Narrow linewidth laser array generation structure based on echo wall microcavity |
| CN114498273A (en) * | 2021-12-31 | 2022-05-13 | 北京无线电计量测试研究所 | Microwave signal processing device |
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| CN114498273B (en) * | 2021-12-31 | 2023-10-13 | 北京无线电计量测试研究所 | Microwave signal processing device |
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